--have you ever been to Beijing before?
题型:选择题
问题:
--have you ever been to Beijing before?
--No. it is the first time that I ____here.
A.am
B.be
C.have been
D.had been
--have you ever been to Beijing before?
--No. it is the first time that I ____here.
A.am
B.be
C.have been
D.had been